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Date: Thu, 12 Aug 2021 10:59:46 -0700
From: Luiz Augusto von Dentz <luiz.dentz@...il.com>
To: Joseph Hwang <josephsih@...omium.org>
Cc: "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>,
Marcel Holtmann <marcel@...tmann.org>,
Pali Rohár <pali@...nel.org>,
Joseph Hwang <josephsih@...gle.com>,
ChromeOS Bluetooth Upstreaming
<chromeos-bluetooth-upstreaming@...omium.org>,
Miao-chen Chou <mcchou@...omium.org>,
Johan Hedberg <johan.hedberg@...il.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 3/4] Bluetooth: set quality report callback for Intel
Hi Joseph,
On Thu, Aug 12, 2021 at 2:16 AM Joseph Hwang <josephsih@...omium.org> wrote:
>
> This patch sets up set_quality_report callback for Intel to
> set and reset the debug features.
>
> Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
> Signed-off-by: Joseph Hwang <josephsih@...omium.org>
> ---
>
> Changes in v7:
> - Rebase on Tedd's patches that moved functionality from btusb to
> btintel.
>
> Changes in v5:
> - Removed CONFIG_BT_FEATURE_QUALITY_REPORT since there was no
> large size impact.
>
> drivers/bluetooth/btintel.c | 81 ++++++++++++++++++++++++++++++++++++-
> drivers/bluetooth/btintel.h | 6 +++
> 2 files changed, 86 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
> index 643e2194ca01..611c3ea5425f 100644
> --- a/drivers/bluetooth/btintel.c
> +++ b/drivers/bluetooth/btintel.c
> @@ -1291,8 +1291,10 @@ static int btintel_set_debug_features(struct hci_dev *hdev,
> u8 trace_enable = 0x02;
> struct sk_buff *skb;
>
> - if (!features)
> + if (!features) {
> + bt_dev_warn(hdev, "Debug features not read");
> return -EINVAL;
> + }
>
> if (!(features->page1[0] & 0x3f)) {
> bt_dev_info(hdev, "Telemetry exception format not supported");
> @@ -1323,9 +1325,77 @@ static int btintel_set_debug_features(struct hci_dev *hdev,
> }
> kfree_skb(skb);
>
> + bt_dev_info(hdev, "set debug features: trace_enable 0x%02x mask 0x%02x",
> + trace_enable, mask[3]);
> +
> return 0;
> }
>
> +static int btintel_reset_debug_features(struct hci_dev *hdev,
> + const struct intel_debug_features *features)
> +{
> + u8 mask[11] = { 0x0a, 0x92, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00 };
> + u8 trace_enable = 0x00;
> + struct sk_buff *skb;
> +
> + if (!features) {
> + bt_dev_warn(hdev, "Debug features not read");
> + return -EINVAL;
> + }
> +
> + if (!(features->page1[0] & 0x3f)) {
> + bt_dev_info(hdev, "Telemetry exception format not supported");
> + return 0;
> + }
> +
> + /* Should stop the trace before writing ddc event mask. */
> + skb = __hci_cmd_sync(hdev, 0xfca1, 1, &trace_enable, HCI_INIT_TIMEOUT);
> + if (IS_ERR(skb)) {
> + bt_dev_err(hdev, "Stop tracing of link statistics events failed (%ld)",
> + PTR_ERR(skb));
> + return PTR_ERR(skb);
> + }
> + kfree_skb(skb);
> +
> + skb = __hci_cmd_sync(hdev, 0xfc8b, 11, mask, HCI_INIT_TIMEOUT);
> + if (IS_ERR(skb)) {
> + bt_dev_err(hdev, "Setting Intel telemetry ddc write event mask failed (%ld)",
> + PTR_ERR(skb));
> + return PTR_ERR(skb);
> + }
> + kfree_skb(skb);
> +
> + bt_dev_info(hdev, "reset debug features: trace_enable 0x%02x mask 0x%02x",
> + trace_enable, mask[3]);
> +
> + return 0;
> +}
> +
> +int btintel_set_quality_report(struct hci_dev *hdev, bool enable)
> +{
> + struct intel_debug_features features;
> + int err;
> +
> + bt_dev_dbg(hdev, "enable %d", enable);
> +
> + /* Read the Intel supported features and if new exception formats
> + * supported, need to load the additional DDC config to enable.
> + */
> + err = btintel_read_debug_features(hdev, &features);
> + if (err)
> + return err;
> +
> + /* Set or reset the debug features. */
> + if (enable)
> + err = btintel_set_debug_features(hdev, &features);
> + else
> + err = btintel_reset_debug_features(hdev, &features);
> +
> + return err;
> +}
> +EXPORT_SYMBOL_GPL(btintel_set_quality_report);
> +
> static const struct firmware *btintel_legacy_rom_get_fw(struct hci_dev *hdev,
> struct intel_version *ver)
> {
> @@ -1951,6 +2021,9 @@ static int btintel_bootloader_setup(struct hci_dev *hdev,
> btintel_load_ddc_config(hdev, ddcname);
> }
>
> + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);
> + bt_dev_dbg(hdev, "HCI_QUALITY_REPORT cleared");
I would remove such debugs since I don't think they have any value
here, besides it doesn't seem HCI_QUALITY_REPORT is ever set anyway
which perhaps should be done by the core itself after calling the
callback.
> /* Read the Intel version information after loading the FW */
> err = btintel_read_version(hdev, &new_ver);
> if (err)
> @@ -2132,6 +2205,9 @@ static int btintel_bootloader_setup_tlv(struct hci_dev *hdev,
> */
> btintel_load_ddc_config(hdev, ddcname);
>
> + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);
> + bt_dev_dbg(hdev, "HCI_QUALITY_REPORT cleared");
Ditto.
> /* Read the Intel version information after loading the FW */
> err = btintel_read_version_tlv(hdev, &new_ver);
> if (err)
> @@ -2230,6 +2306,9 @@ static int btintel_setup_combined(struct hci_dev *hdev)
> set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
> set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
>
> + /* Set up the quality report callback for Intel devices */
> + hdev->set_quality_report = btintel_set_quality_report;
> +
> /* For Legacy device, check the HW platform value and size */
> if (skb->len == sizeof(ver) && skb->data[1] == 0x37) {
> bt_dev_dbg(hdev, "Read the legacy Intel version information");
> diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
> index aa64072bbe68..fe02cb9ac96c 100644
> --- a/drivers/bluetooth/btintel.h
> +++ b/drivers/bluetooth/btintel.h
> @@ -204,6 +204,7 @@ int btintel_configure_setup(struct hci_dev *hdev);
> void btintel_bootup(struct hci_dev *hdev, const void *ptr, unsigned int len);
> void btintel_secure_send_result(struct hci_dev *hdev,
> const void *ptr, unsigned int len);
> +int btintel_set_quality_report(struct hci_dev *hdev, bool enable);
> #else
>
> static inline int btintel_check_bdaddr(struct hci_dev *hdev)
> @@ -294,4 +295,9 @@ static inline void btintel_secure_send_result(struct hci_dev *hdev,
> const void *ptr, unsigned int len)
> {
> }
> +
> +static inline int btintel_set_quality_report(struct hci_dev *hdev, bool enable)
> +{
> + return -ENODEV;
> +}
> #endif
> --
> 2.32.0.605.g8dce9f2422-goog
>
--
Luiz Augusto von Dentz
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